Computer fan



FIG. 1 is a front view of a computer fan showing our design;

FIG. 2 is a rear view of the computer fan;

FIG. 3 is a front right bottom perspective view of the computer fan;

FIG. 4 is rear bottom right perspective view of the computer fan;

FIG. 5 is a rear top left perspective view of the computer fan;

FIG. 6 is a front left view of the computer fan; and,

FIG. 7 is a front top view of the computer fan.

The dashed broken lines in FIGS. 1-7 show portions of the computer fan that form no part of the claimed design. 

CLAIM The ornamental design for a computer fan, as shown and described. 